General Question

Is there any danger in having too much salad?

I find myself now in the habit of eating two good-sized salads a day—usually mixed greens or spring mix for lunch (often with tuna on the top), and another with dinner (spinach mostly, but sometimes mixed greens or romaine).

Aside from the obvious effect on my digestive system, is there any harm in eating a lot of salad every day?

I think the only possible hazard would be not washing your greens properly. Plus also certain pesticides are not great on vegetables. I am no expert but that comes to mind. Also be weary of certain tunas as they can be high in mercury. But really I am nit picking here, I think salad is the way to go!

Not at all.
You will certainly be regular in your elimination process, all that fiber.
Getting plenty of vitamins and minerals is also a benefit.
Otherwise, as long as your ears are not becoming elongated and your teeth are not starting to buck and turn rodent orange and you see no evidence of whiskers, it’s all good.